TAMU PSYC 307 - Brain and Prenatal Development (3 pages)

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Brain and Prenatal Development

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Brain and Prenatal Development


This lecture covers the bases of brain development and cell maturation, as well as prenatal development.

Lecture number:
Lecture Note
Texas A&M University
Psyc 307 - Developmntl Psychology
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PSYC 307 1st Edition Lecture 4 Overview of Previous Lecture I Biological Backgrounds Overview of Current Lecture II Brain Development a Neurons b Brain Maturation c Experience Expectant Plasticity d Experience Dependent Plasticity e Studying Brain Functions III Prenatal Development a Periods of Prenatal Development Current Lecture Sept 11 Brain Development I Neurons make up the brain a Made up of synapses that send signals between neurons and throughout the brain b Gray matter cell bodies and dendrites c White matter myelin sheaths neural axons II Brain Maturation development a Neurogenesis birth of cells in neural tube i Most nerve cells are born prenatally 1 Few are formed in adolescence or adulthood b Migration of cells cells move to their correct location i DNA tells them where in the brain to go ii Glial cells transport them there iii Brain build in an inside out pattern the newest cells are at the top of the brain oldest in the middle 1 Hippocampus only part of the brain not built that way iv Very organized layers columns of cells c Cell differentiation i Develop important parts once they are in their correct location 1 Post natal d Synaptogenesis connection between neurons e Myelination occurs in adolescence f Synaptic pruning pathways become efficient by cutting down on the number of synaptic pathways i Two years of age an individual has the most synapses they will ever have 1 Centered in the visual cortex low processing at this age ii Different parts of the brain mature at different rates 1 3 years peak of maturation in prefrontal cortex g parts of brain diagram III Experience Expectant Plasticity a Brain development as a result of ubiquitous experiences i Experiences common across all people cultures 1 Language cognition visual perception ii Sensitive periods of development 1 Specific time periods for development a Ie language b Ie binocular vision both eyes must work together to develop correctly iii Vulnerability of the brain IV Experience Dependent

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